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Finding the Fourth Proportional to 554,428.08, 765,107.04 and 312,712.65

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Solution

The fourth proportional to 554,428.08, 765,107.04 and 312,712.65 is: 431,541.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,428.08 : 765,107.04 = 312,712.65 : x
  2. Step 2: Convert to fraction form
    554,428.08/765,107.04 = 312,712.65/x
  3. Step 3: Cross multiply
    554,428.08x = 765,107.04 × 312,712.65
  4. Step 4: Simplify right side
    554,428.08x = 239,258,650,012.06
  5. Step 5: Solve for x
    x = 239,258,650,012.06/554,428.08
  6. Step 6: Final answer
    x = 431,541.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.